Annotation of parser3/src/main/pa_http.C, revision 1.1
1.1 ! paf 1: /** @file
! 2: Parser: http support functions.
! 3:
! 4: Copyright(c) 2001-2005 ArtLebedev Group (http://www.artlebedev.com)
! 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
! 6: */
! 7:
! 8: static const char * const IDENT_HTTP_C="$Date: 2005/11/22 15:53:50 $";
! 9:
! 10: #include "pa_http.h"
! 11: #include "pa_common.h"
! 12: #include "pa_charsets.h"
! 13: #include "pa_request_charsets.h"
! 14:
! 15: // defines
! 16:
! 17: #define HTTP_METHOD_NAME "method"
! 18: #define HTTP_FORM_NAME "form"
! 19: #define HTTP_BODY_NAME "body"
! 20: #define HTTP_TIMEOUT_NAME "timeout"
! 21: #define HTTP_HEADERS_NAME "headers"
! 22: #define HTTP_ANY_STATUS_NAME "any-status"
! 23: #define HTTP_CHARSET_NAME "charset"
! 24: #define HTTP_TABLES_NAME "tables"
! 25: #define HTTP_USER "user"
! 26: #define HTTP_PASSWORD "password"
! 27:
! 28: #define DEFAULT_USER_AGENT "parser3"
! 29:
! 30: # ifndef INADDR_NONE
! 31: # define INADDR_NONE ((ulong) -1)
! 32: # endif
! 33:
! 34: #undef CRLF
! 35: #define CRLF "\r\n"
! 36:
! 37: static bool set_addr(struct sockaddr_in *addr, const char* host, const short port){
! 38: memset(addr, 0, sizeof(*addr));
! 39: addr->sin_family=AF_INET;
! 40: addr->sin_port=htons(port);
! 41: if(host) {
! 42: ulong packed_ip=inet_addr(host);
! 43: if(packed_ip!=INADDR_NONE)
! 44: memcpy(&addr->sin_addr, &packed_ip, sizeof(packed_ip));
! 45: else {
! 46: struct hostent *hostIP=gethostbyname(host);
! 47: if(hostIP)
! 48: memcpy(&addr->sin_addr, hostIP->h_addr, hostIP->h_length);
! 49: else
! 50: return false;
! 51: }
! 52: } else
! 53: addr->sin_addr.s_addr=INADDR_ANY;
! 54: return true;
! 55: }
! 56:
! 57: size_t guess_content_length(char* buf) {
! 58: char* ptr;
! 59: if((ptr=strstr(buf, "Content-Length:"))) // Apache
! 60: goto found;
! 61: if((ptr=strstr(buf, "content-length:"))) // Parser 3
! 62: goto found;
! 63: if((ptr=strstr(buf, "Content-length:"))) // maybe 1
! 64: goto found;
! 65: if((ptr=strstr(buf, "CONTENT-LENGTH:"))) // maybe 2
! 66: goto found;
! 67: return 0;
! 68: found:
! 69: char *error_pos;
! 70: size_t result=(size_t)strtol(ptr+15/*strlen("CONTENT-LENGTH:")*/, &error_pos, 0);
! 71:
! 72: const size_t reasonable_initial_max=0x400*0x400*10 /*10M*/;
! 73: if(result>reasonable_initial_max) // sanity check
! 74: return reasonable_initial_max;
! 75: return 0;//result;
! 76: }
! 77:
! 78: static int http_read_response(char*& response, size_t& response_size, int sock, bool fail_on_status_ne_200) {
! 79: int result=0;
! 80: // fetching some to local buffer, guessing on possible content-length
! 81: response_size=0x400*20; // initial size if content-length could not be determined
! 82: const size_t preview_size=0x400*20;
! 83: char preview_buf[preview_size+1/*terminator*/]; // 20K buffer to preview headers
! 84: ssize_t received_size=recv(sock, preview_buf, preview_size, 0);
! 85: if(received_size==0)
! 86: goto done;
! 87: if(received_size<0) {
! 88: if(int no=pa_socks_errno())
! 89: throw Exception("http.timeout",
! 90: 0,
! 91: "error receiving response header: %s (%d)", pa_socks_strerr(no), no);
! 92: goto done;
! 93: }
! 94: // detecting response_size
! 95: {
! 96: preview_buf[received_size]=0; // terminator
! 97: if(size_t content_length=guess_content_length(preview_buf))
! 98: response_size=preview_size+content_length; // a little more than needed, will adjust response_size by actual received size later
! 99: }
! 100:
! 101: // [gcc is happier this way, see goto above]
! 102: {
! 103: // allocating initial buf
! 104: response=(char*)pa_malloc_atomic(response_size+1/*terminator*/); // just setting memory block type
! 105: char* ptr=response;
! 106: size_t todo_size=response_size;
! 107: // coping part of already received body
! 108: memcpy(ptr, preview_buf, received_size);
! 109: ptr+=received_size;
! 110: todo_size-=received_size;
! 111:
! 112: // we use terminator byte for two purposes here:
! 113: // 1. we return there zero always, not knowing: maybe they would want to create String form $file.body?
! 114: // invariant: all Strings should have zero-terminated buffers
! 115: // 2. we use that out-of-size byte to detect if our content-length guess was wrong
! 116: // when recv gets more than we expected
! 117: // a) we know that the content-length guess was wrong
! 118: // b) we have space to put the first byte of extra data
! 119: // c) we use less code to detect normal situation: on last while-cycle recv expected to just return 0
! 120: while(true) {
! 121: received_size=recv(sock, ptr, todo_size+1/*there is always a place for terminator*/, 0);
! 122: if(received_size==0) {
! 123: response_size-=todo_size; // in case we received less than expected, cut down the reported size
! 124: break;
! 125: }
! 126: if(received_size<0) {
! 127: if(int no=pa_socks_errno())
! 128: throw Exception("http.timeout",
! 129: 0,
! 130: "error receiving response body: %s (%d)", pa_socks_strerr(no), no);
! 131: break;
! 132: }
! 133: // they've touched the terminator?
! 134: if((size_t)received_size>todo_size)
! 135: {
! 136: // that means that our guessed response_size was not big enough
! 137: const size_t grow_chunk_size=0x400*0x400; // 1M
! 138: response_size+=grow_chunk_size;
! 139: size_t ptr_offset=ptr-response;
! 140: response=(char*)pa_realloc(response, response_size+1/*terminator*/);
! 141: ptr=response+ptr_offset;
! 142: todo_size+=grow_chunk_size;
! 143: }
! 144: // can't do this before realloc: we need <todo_size check
! 145: ptr+=received_size;
! 146: todo_size-=received_size;
! 147:
! 148: char* EOLat=0;
! 149: if(!result && (EOLat=strstr(response, "\n"))) { // checking status in first response
! 150: const String status_line(pa_strdup(response, EOLat-response));
! 151: ArrayString astatus;
! 152: size_t pos_after=0;
! 153: status_line.split(astatus, pos_after, " ");
! 154: const String& status_code=*astatus.get(astatus.count()>1?1:0);
! 155: result=status_code.as_int();
! 156:
! 157: if(fail_on_status_ne_200 && result!=200)
! 158: throw Exception("http.status",
! 159: &status_code,
! 160: "invalid HTTP response status");
! 161: }
! 162: }
! 163: }
! 164: done:
! 165: if(result)
! 166: {
! 167: response[response_size]=0;
! 168: return result;
! 169: }
! 170: else
! 171: throw Exception("http.response",
! 172: 0,
! 173: "bad response from host - no status found (size=%u)", response_size);
! 174: }
! 175:
! 176: /* ********************** request *************************** */
! 177:
! 178: #if defined(SIGALRM) && defined(HAVE_SIGSETJMP) && defined(HAVE_SIGLONGJMP)
! 179: # define PA_USE_ALARM
! 180: #endif
! 181:
! 182: #ifdef PA_USE_ALARM
! 183: static sigjmp_buf timeout_env;
! 184: static void timeout_handler(int /*sig*/){
! 185: siglongjmp(timeout_env, 1);
! 186: }
! 187: #endif
! 188:
! 189: static int http_request(char*& response, size_t& response_size,
! 190: const char* host, short port,
! 191: const char* request,
! 192: int timeout_secs,
! 193: bool fail_on_status_ne_200) {
! 194: if(!host)
! 195: throw Exception("http.host",
! 196: 0,
! 197: "zero hostname"); //never
! 198:
! 199: volatile // to prevent makeing it register variable, because it will be clobbered by longjmp [thanks gcc warning]
! 200: int sock=-1;
! 201: #ifdef PA_USE_ALARM
! 202: signal(SIGALRM, timeout_handler);
! 203: #endif
! 204: #ifdef PA_USE_ALARM
! 205: if(sigsetjmp(timeout_env, 1)) {
! 206: // stupid gcc [2.95.4] generated bad code
! 207: // which failed to handle sigsetjmp+throw: crashed inside of pre-throw code.
! 208: // rewritten simplier [athough duplicating closesocket code]
! 209: if(sock>=0)
! 210: closesocket(sock);
! 211: throw Exception("http.timeout",
! 212: 0,
! 213: "timeout occured while retrieving document");
! 214: return 0; // never
! 215: } else {
! 216: alarm(timeout_secs);
! 217: #endif
! 218: try {
! 219: int result;
! 220: struct sockaddr_in dest;
! 221:
! 222: if(!set_addr(&dest, host, port))
! 223: throw Exception("http.host",
! 224: 0,
! 225: "can not resolve hostname \"%s\"", host);
! 226:
! 227: if((sock=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP/*0*/))<0) {
! 228: int no=pa_socks_errno();
! 229: throw Exception("http.connect",
! 230: 0,
! 231: "can not make socket: %s (%d)", pa_socks_strerr(no), no);
! 232: }
! 233:
! 234: // To enable SO_DONTLINGER (that is, disable SO_LINGER)
! 235: // l_onoff should be set to zero and setsockopt should be called
! 236: linger dont_linger={0,0};
! 237: setsockopt(sock, SOL_SOCKET, SO_LINGER, (const char *)&dont_linger, sizeof(dont_linger));
! 238:
! 239: #ifdef WIN32
! 240: // SO_*TIMEO can be defined in .h but not implemlemented in protocol,
! 241: // failing subsequently with Option not supported by protocol (99) message
! 242: // could not suppress that, so leaving this only for win32
! 243: int timeout_ms=timeout_secs*1000;
! 244: setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (const char*)&timeout_ms, sizeof(timeout_ms));
! 245: setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (const char*)&timeout_ms, sizeof(timeout_ms));
! 246: #endif
! 247:
! 248: if(connect(sock, (struct sockaddr *)&dest, sizeof(dest))) {
! 249: int no=pa_socks_errno();
! 250: throw Exception("http.connect",
! 251: 0,
! 252: "can not connect to host \"%s\": %s (%d)", host, pa_socks_strerr(no), no);
! 253: }
! 254: size_t request_size=strlen(request);
! 255: if(send(sock, request, request_size, 0)!=(ssize_t)request_size) {
! 256: int no=pa_socks_errno();
! 257: throw Exception("http.timeout",
! 258: 0,
! 259: "error sending request: %s (%d)", pa_socks_strerr(no), no);
! 260: }
! 261:
! 262: result=http_read_response(response, response_size, sock, fail_on_status_ne_200);
! 263: closesocket(sock);
! 264: #ifdef PA_USE_ALARM
! 265: alarm(0);
! 266: #endif
! 267: return result;
! 268: } catch(...) {
! 269: #ifdef PA_USE_ALARM
! 270: alarm(0);
! 271: #endif
! 272: if(sock>=0)
! 273: closesocket(sock);
! 274: rethrow;
! 275: }
! 276: #ifdef PA_USE_ALARM
! 277: }
! 278: #endif
! 279: }
! 280:
! 281: #ifndef DOXYGEN
! 282: struct Http_pass_header_info {
! 283: Request_charsets* charsets;
! 284: String* request;
! 285: bool user_agent_specified;
! 286: };
! 287: #endif
! 288: static void http_pass_header(HashStringValue::key_type key,
! 289: HashStringValue::value_type value,
! 290: Http_pass_header_info *info) {
! 291: *info->request <<key<<": "
! 292: << attributed_meaning_to_string(*value, String::L_HTTP_HEADER, false)
! 293: << CRLF;
! 294:
! 295: if(String(key, String::L_TAINTED).change_case(info->charsets->source(), String::CC_UPPER)=="USER-AGENT")
! 296: info->user_agent_specified=true;
! 297: }
! 298:
! 299:
! 300: static Charset* detect_charset(Charset& source_charset, const String& content_type_value) {
! 301: const String::Body CONTENT_TYPE_VALUE=
! 302: content_type_value.change_case(source_charset, String::CC_UPPER);
! 303: // content-type: xxx/xxx; source_charset=WE-NEED-THIS
! 304: // content-type: xxx/xxx; source_charset="WE-NEED-THIS"
! 305: // content-type: xxx/xxx; source_charset="WE-NEED-THIS";
! 306: size_t before_charseteq_pos=CONTENT_TYPE_VALUE.pos("CHARSET=");
! 307: if(before_charseteq_pos!=STRING_NOT_FOUND) {
! 308: size_t charset_begin=before_charseteq_pos+8/*CHARSET="*/;
! 309: size_t open_quote_pos=CONTENT_TYPE_VALUE.pos('"', charset_begin);
! 310: bool quoted=open_quote_pos==charset_begin;
! 311: if(quoted)
! 312: charset_begin++; // skip opening '"'
! 313: size_t charset_end=CONTENT_TYPE_VALUE.length();
! 314: if(quoted) {
! 315: size_t close_quote_pos=CONTENT_TYPE_VALUE.pos('"', charset_begin);
! 316: if(close_quote_pos!=STRING_NOT_FOUND)
! 317: charset_end=close_quote_pos;
! 318: } else {
! 319: size_t delim_pos=CONTENT_TYPE_VALUE.pos(';', charset_begin);
! 320: if(delim_pos!=STRING_NOT_FOUND)
! 321: charset_end=delim_pos;
! 322: }
! 323: const String::Body CHARSET_NAME_BODY=
! 324: CONTENT_TYPE_VALUE.mid(charset_begin, charset_end);
! 325:
! 326: return &charsets.get(CHARSET_NAME_BODY);
! 327: }
! 328:
! 329: return 0;
! 330: }
! 331:
! 332: static const String* basic_authorization_field(const char* user, const char* pass) {
! 333: if(!user&& !pass)
! 334: return 0;
! 335:
! 336: String combined;
! 337: if(user)
! 338: combined<<user;
! 339: combined<<":";
! 340: if(pass)
! 341: combined<<pass;
! 342:
! 343: String* result=new String("Basic "); *result<<pa_base64_encode(combined.cstr(), combined.length());
! 344: return result;
! 345: }
! 346:
! 347: static void form_string_value2string(
! 348: HashStringValue::key_type key,
! 349: const String& value,
! 350: String& result)
! 351: {
! 352: result << String(key, String::L_URI) << "=";
! 353: result.append(value, String::L_URI, true);
! 354: result<< "&";
! 355: }
! 356: #ifndef DOXYGEN
! 357: struct Form_table_value2string_info {
! 358: HashStringValue::key_type key;
! 359: String& result;
! 360:
! 361: Form_table_value2string_info(HashStringValue::key_type akey, String& aresult):
! 362: key(akey), result(aresult) {}
! 363: };
! 364: #endif
! 365: static void form_table_value2string(Table::element_type row, Form_table_value2string_info* info) {
! 366: form_string_value2string(info->key, *row->get(0), info->result);
! 367: }
! 368: static void form_value2string(
! 369: HashStringValue::key_type key,
! 370: HashStringValue::value_type value,
! 371: String* result)
! 372: {
! 373: if(const String* svalue=value->get_string())
! 374: form_string_value2string(key, *svalue, *result);
! 375: else if(Table* tvalue=value->get_table()) {
! 376: Form_table_value2string_info info(key, *result);
! 377: tvalue->for_each(form_table_value2string, &info);
! 378: } else
! 379: throw Exception(0,
! 380: new String(key, String::L_TAINTED),
! 381: "is %s, "HTTP_FORM_NAME" option value must either string or table", value->type());
! 382: }
! 383: const char* pa_form2string(HashStringValue& form) {
! 384: String string;
! 385: form.for_each(form_value2string, &string);
! 386: return string.cstr(String::L_UNSPECIFIED);
! 387: }
! 388: static void find_headers_end(char* p,
! 389: char*& headers_end_at,
! 390: char*& raw_body)
! 391: {
! 392: raw_body=p;
! 393: // \n\n
! 394: // \r\n\r\n
! 395: while((p=strchr(p, '\n'))) {
! 396: headers_end_at=++p; // \n>.<
! 397: if(*p=='\r') // \r\n>\r?<\n
! 398: p++;
! 399: if(*p=='\n') { // \r\n\r>\n?<
! 400: raw_body=p+1;
! 401: return;
! 402: }
! 403: }
! 404: headers_end_at=0;
! 405: }
! 406:
! 407: /// @todo build .cookies field. use ^file.tables.SET-COOKIES.menu{ for now
! 408: File_read_http_result pa_internal_file_read_http(Request_charsets& charsets,
! 409: const String& file_spec,
! 410: bool as_text,
! 411: HashStringValue *options) {
! 412: File_read_http_result result;
! 413: char host[MAX_STRING];
! 414: const char* uri;
! 415: short port;
! 416: const char* method="GET"; bool method_is_get;
! 417: HashStringValue* form=0;
! 418: const char* body_cstr=0;
! 419: int timeout_secs=2;
! 420: bool fail_on_status_ne_200=true;
! 421: Value* vheaders=0;
! 422: Charset *asked_remote_charset=0;
! 423: const char* user_cstr=0;
! 424: const char* password_cstr=0;
! 425:
! 426: if(options) {
! 427: int valid_options=pa_get_valid_file_options_count(*options);
! 428:
! 429: if(Value* vmethod=options->get(HTTP_METHOD_NAME)) {
! 430: valid_options++;
! 431: method=vmethod->as_string().cstr();
! 432: }
! 433: if(Value* vform=options->get(HTTP_FORM_NAME)) {
! 434: valid_options++;
! 435: form=vform->get_hash();
! 436: }
! 437: if(Value* vbody=options->get(HTTP_BODY_NAME)) {
! 438: valid_options++;
! 439: body_cstr=vbody->as_string().cstr(String::L_UNSPECIFIED);
! 440: }
! 441: if(Value* vtimeout=options->get(HTTP_TIMEOUT_NAME)) {
! 442: valid_options++;
! 443: timeout_secs=vtimeout->as_int();
! 444: }
! 445: if((vheaders=options->get(HTTP_HEADERS_NAME))) {
! 446: valid_options++;
! 447: }
! 448: if(Value* vany_status=options->get(HTTP_ANY_STATUS_NAME)) {
! 449: valid_options++;
! 450: fail_on_status_ne_200=!vany_status->as_bool();
! 451: }
! 452: if(Value* vcharset_name=options->get(HTTP_CHARSET_NAME)) {
! 453: valid_options++;
! 454: asked_remote_charset=&::charsets.get(vcharset_name->as_string().
! 455: change_case(charsets.source(), String::CC_UPPER));
! 456: }
! 457: if(Value* vuser=options->get(HTTP_USER)) {
! 458: valid_options++;
! 459: user_cstr=vuser->as_string().cstr();
! 460: }
! 461: if(Value* vpassword=options->get(HTTP_PASSWORD)) {
! 462: valid_options++;
! 463: password_cstr=vpassword->as_string().cstr();
! 464: }
! 465:
! 466: if(valid_options!=options->count())
! 467: throw Exception("parser.runtime",
! 468: 0,
! 469: "invalid option passed");
! 470: }
! 471: if(!asked_remote_charset) // defaulting to $request:charset
! 472: asked_remote_charset=&charsets.source();
! 473:
! 474: method_is_get=strcmp(method, "GET")==0;
! 475: if(method_is_get && body_cstr)
! 476: throw Exception("parser.runtime",
! 477: 0,
! 478: "you can not use $."HTTP_BODY_NAME" option with method GET");
! 479:
! 480: //preparing request
! 481: String& connect_string=*new String;
! 482: // not in ^sql{... L_SQL ...} spirit, but closer to ^file::load one
! 483: connect_string.append(file_spec, String::L_URI); // tainted pieces -> URI pieces
! 484:
! 485: String request_head_and_body;
! 486: {
! 487: // influence URLencoding of tainted pieces to String::L_URI lang
! 488: Temp_client_charset temp(charsets, *asked_remote_charset);
! 489:
! 490: const char* connect_string_cstr=connect_string.cstr(String::L_UNSPECIFIED);
! 491:
! 492: const char* current=connect_string_cstr;
! 493: if(strncmp(current, "http://", 7)!=0)
! 494: throw Exception(0,
! 495: &connect_string,
! 496: "does not start with http://"); //never
! 497: current+=7;
! 498:
! 499: strncpy(host, current, sizeof(host)-1); host[sizeof(host)-1]=0;
! 500: char* host_uri=lsplit(host, '/');
! 501: uri=host_uri?current+(host_uri-1-host):"/";
! 502: char* port_cstr=lsplit(host, ':');
! 503: char* error_pos=0;
! 504: port=port_cstr?(short)strtol(port_cstr, &error_pos, 0):80;
! 505:
! 506: bool uri_has_query_string=strchr(uri, '?')!=0;
! 507:
! 508: //making request head
! 509: String head;
! 510: head << method;
! 511: head << " " << uri;
! 512: if(form)
! 513: if(method_is_get)
! 514: head << (uri_has_query_string?"&":"?") << pa_form2string(*form);
! 515: head <<" HTTP/1.0" CRLF
! 516: "host: "<< host << CRLF;
! 517: if(form && !method_is_get) {
! 518: head << "content-type: application/x-www-form-urlencoded" CRLF;
! 519: body_cstr = pa_form2string(*form);
! 520: }
! 521:
! 522: // http://www.ietf.org/rfc/rfc2617.txt
! 523: if(const String* authorization_field_value=basic_authorization_field(user_cstr, password_cstr))
! 524: head<<"authorization: "<<*authorization_field_value<<CRLF;
! 525:
! 526: bool user_agent_specified=false;
! 527: if(vheaders && !vheaders->is_string()) { // allow empty
! 528: if(HashStringValue *headers=vheaders->get_hash()) {
! 529: Http_pass_header_info info={&charsets, &head, false};
! 530: headers->for_each(http_pass_header, &info);
! 531: user_agent_specified=info.user_agent_specified;
! 532: } else
! 533: throw Exception("parser.runtime",
! 534: &connect_string,
! 535: "headers param must be hash");
! 536: };
! 537: if(!user_agent_specified) // defaulting
! 538: head << "user-agent: " DEFAULT_USER_AGENT CRLF;
! 539:
! 540: if(body_cstr) {
! 541: // recode those pieces which are not in String::L_URI lang
! 542: // [those violating HTTP standard, but widly used]
! 543: body_cstr=Charset::transcode(
! 544: String::C(body_cstr, strlen(body_cstr)),
! 545: charsets.source(),
! 546: *asked_remote_charset);
! 547:
! 548: head << "content-length: " << format(strlen(body_cstr), "%u") << CRLF;
! 549: }
! 550:
! 551: const char* head_cstr=head.cstr(String::L_UNSPECIFIED);
! 552:
! 553: // recode those pieces which are not in String::L_URI lang
! 554: // [those violating HTTP standard, but widly used]
! 555: head_cstr=Charset::transcode(
! 556: String::C(head_cstr, strlen(head_cstr)),
! 557: charsets.source(),
! 558: *asked_remote_charset);
! 559:
! 560: // head + end of header
! 561: request_head_and_body << head_cstr << CRLF;
! 562: // body
! 563: if(body_cstr)
! 564: request_head_and_body << body_cstr;
! 565: }
! 566:
! 567: //sending request
! 568: char* response;
! 569: size_t response_size;
! 570: int status_code=http_request(response, response_size,
! 571: host, port, request_head_and_body.cstr(),
! 572: timeout_secs, fail_on_status_ne_200);
! 573:
! 574: //processing results
! 575: char* raw_body; size_t raw_body_size;
! 576: char* headers_end_at;
! 577: find_headers_end(response,
! 578: headers_end_at,
! 579: raw_body);
! 580: raw_body_size=response_size-(raw_body-response);
! 581:
! 582: result.headers=new HashStringValue;
! 583: VHash* vtables=new VHash;
! 584: result.headers->put(HTTP_TABLES_NAME, vtables);
! 585: Charset* real_remote_charset=0; // undetected, yet
! 586:
! 587: if(headers_end_at) {
! 588: *headers_end_at=0;
! 589: const String header_block(String::C(response, headers_end_at-response), true);
! 590:
! 591: ArrayString aheaders;
! 592: HashStringValue& tables=vtables->hash();
! 593:
! 594: size_t pos_after=0;
! 595: header_block.split(aheaders, pos_after, "\n");
! 596:
! 597: //processing headers
! 598: size_t aheaders_count=aheaders.count();
! 599: for(size_t i=1; i<aheaders_count; i++) {
! 600: const String& line=*aheaders.get(i);
! 601: size_t pos=line.pos(':');
! 602: if(pos==STRING_NOT_FOUND || pos<1)
! 603: throw Exception("http.response",
! 604: &connect_string,
! 605: "bad response from host - bad header \"%s\"", line.cstr());
! 606: const String::Body HEADER_NAME=
! 607: line.mid(0, pos).change_case(charsets.source(), String::CC_UPPER);
! 608: const String& header_value=line.mid(pos+1, line.length()).trim(String::TRIM_BOTH, " \t\r");
! 609: if(as_text && HEADER_NAME=="CONTENT-TYPE")
! 610: real_remote_charset=detect_charset(charsets.source(), header_value);
! 611:
! 612: // tables
! 613: {
! 614: Value *valready=(Value *)tables.get(HEADER_NAME);
! 615: bool existed=valready!=0;
! 616: Table *table;
! 617: if(existed) {
! 618: // second+ appearence
! 619: table=valready->get_table();
! 620: } else {
! 621: // first appearence
! 622: Table::columns_type columns =new ArrayString(1);
! 623: *columns+=new String("value");
! 624: table=new Table(columns);
! 625: }
! 626: // this string becomes next row
! 627: ArrayString& row=*new ArrayString(1);
! 628: row+=&header_value;
! 629: *table+=&row;
! 630: // not existed before? add it
! 631: if(!existed)
! 632: tables.put(HEADER_NAME, new VTable(table));
! 633: }
! 634:
! 635: result.headers->put(HEADER_NAME, new VString(header_value));
! 636: }
! 637: }
! 638:
! 639: // output response
! 640: String::C real_body=String::C(raw_body, raw_body_size);
! 641: if(as_text && raw_body_size) { // must be checked because transcode returns CONST string in case length==0, which contradicts hacking few lines below
! 642: // defaulting to used-asked charset [it's never empty!]
! 643: if(!real_remote_charset)
! 644: real_remote_charset=asked_remote_charset;
! 645: real_body=Charset::transcode(real_body, *real_remote_charset, charsets.source());
! 646: }
! 647:
! 648: result.str=const_cast<char *>(real_body.str); // hacking a little
! 649: result.length=real_body.length;
! 650: result.headers->put(file_status_name, new VInt(status_code));
! 651: return result;
! 652: }
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